圆柱筒式空投气囊缓冲模拟

发布时间：2018-06-19 17:30

  本文选题：空投 + 气囊　； 参考：《包装工程》2017年17期

【摘要】：目的研究某空投缓冲系统圆柱筒式气囊的缓冲过程,得出缓冲特性曲线,并校核装备冲击过载。方法基于有限元理论,利用Ansys中的显示动力学分析软件LS-DYNA建立气囊缓冲系统的有限元模型,采用粒子法,对气囊缓冲过程进行数值模拟,并与传统气囊仿真所使用的控制体积法进行对比。结果经模拟得出空投着陆缓冲过程中气囊排气口打开时间为63.4 ms,缓冲过程中的最大过载为13.3g,获得了缓冲高度、货台加速度等特性的变化规律。将气囊缓冲特性与使用传统的控制体积法仿真的结果进行了对比,排气口打开时间误差为10.7%,最大过载误差为8.6%。结论 2种方法的结果对比一致性较好,验证了粒子法进行缓冲气囊模拟的可行性,同时使用圆柱筒式气囊缓冲的最大过载满足装备空投对过载不超过20g的要求。
[Abstract]:Aim to study the buffer process of cylinder airbag in an air drop buffer system, to obtain the buffering characteristic curve, and to check the impact overload of the equipment. Methods based on finite element theory, the finite element model of air bag buffer system was established by using display dynamics analysis software LS-DYNA in Ansys, and the gasbag buffer process was simulated numerically by particle method. And compared with the control volume method used in the traditional airbag simulation. Results the opening time of air bag outlet was 63.4 msand the maximum overload was 13.3 g during the air drop landing buffer process. The characteristics of buffer height and platform acceleration were obtained. The air bag buffer characteristics are compared with the simulation results using the traditional control volume method. The opening time error of the exhaust port is 10.7 and the maximum overload error is 8.6. Conclusion the results of the two methods are in good agreement, which verifies the feasibility of using particle method to simulate the cushioning airbag, and the maximum overload of cylinder airbag buffer can meet the requirement of the overloading of the equipment airdrop less than 20g.
【作者单位】： 军械工程学院;
【分类号】：TB485.1
，

本文编号：2040702